2. 外语
  3. The passage is chiefly about ______. The deep-sea listening system makes use of______.

The passage is chiefly about ______. The deep-sea listening system makes use of______.

admin2009-03-16  91
问题 The passage is chiefly about ______.
The deep-sea listening system makes use of______.
选项 A、the sophisticated technology of focusing sounds under water
B、the capability of sound to travel at high speed
C、the unique property of layers of ocean water in transmitting sound
D、low-frequency sounds traveling across different layers of water
答案C
解析
转载请注明原文地址:https://www.kaotiyun.com/show/v3Pd777K
本试题收录于： 公共英语四级笔试题库公共英语（PETS）分类
0

公共英语四级笔试

公共英语（PETS）

相关试题推荐
随机试题
最新回复(0)